Cho da thuc : P =\(ax^4y^3+10xy^2+4y^3-2x^4y^3-3xy^2+bx^3y^4\)
Biet rang a ; b la hang so va da thuc P co bac 3, hay tinh a, b
thu gon don thuc tim bac he so cua da thuc A=x^3 *(-5/4x^2y)*(2/5x^3y^4)
Tim he so a cua da thuc M(x)= ax2 +5x -3 biet rang da thuc nay co 1 nghiem la 1/2
Tim he so a cua da thuc A(x)=ax^2+5x-3, biet rang da thuc co 1 nghiem bang 1/2?
***Can tim dap an dung, cac anh chi giai giup em a
Chung to rang da thuc f(x) co tong cac he so cua cac hang tu bac chan bang tong cac he so cua cac hang tu bac le Thi x=-1 la not nghiem cua da thuc
bn oi giup mk mk tk cho
tim he so a cua da thuc M(x) = ax^2 +5x-3, biet rang da thuc nay co 1 nghiem là 1/2
a,tim a biet da thuc A(x)=ax2- 1/2x +1 co 1 nghiem la -1/2
b, tim a,b cua da thuc :B(x)= ax2+bx+5 biet B(1)=6 va B(-2) = 15
c, cho da thuc C(x)= ax+b .Tim a,b biet :
x=4 la nhgiem cua C(x)va C(2)=1
bai 1: Cho cac don thuc A=-4/9x^3y va B= 3/8 x^5y^3. Tim cac cap gia tri (x;y)de A,B cung gia tri am
bai 2: viet don thuc B=64xy^12 duoi dang luy thua cua 1 don thuc voi so mu khac 1
bai 3: cho A=8x^5y^3; B=-3x^6y^3; C=-6x^7y^2. CM: Ax^2+Bx+C>0
cho cac da thuc f(x)=ax+b va g(x)=bx+a trong do a;b khac 0 biet rang nghiem cua da thuc f(x) la so duong cmr nghiem cua da thuc g(x) cung la 1 so duong